Liu Hai is busy working overtime in the maintenance department during the day. At night, when Xiao Yun returns to his parents' home, he works in the carrier space with the unfinished second-generation Huangf4 fighter.
The previous f4 fighter in carrier space has been modernized and refitted for many times, and now it is given to the mainland, which can't understand it, because the technical level gap is too big.
Liu Hai has refitted some of them before, and some of them have not. He has changed the avionics system to a dual hydraulic system, changed the advanced radar to an APQ-50X wave interception radar, and is equipped with early semi-active sparrow missiles.
Fortunately, the materials on the aircraft carrier